Bad misfire - Maintenance and Repair Forum

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Bad misfire
Sunday, March 11, 2012 6:16 PM
We first thought an injector went bad because we swapped cylinder 1 and 2 and the misfire followed the injector. Well, long story short...i just had my car shipped to me and now it barely cranks and wont start. I got it to start once but it sounded horrible. Cylinder 2 was not firing. I put in my "new to me" LSJ injectors, new AC Delco spark plugs and even a new ICM. Still, engine barely cranks and will not start.

Any suggestions on what this might be? Could the cranking issue just be the starter? (but even when it's running it's misfiring constantly) Thanks!





"You can only feed them semen for so long before their legs fall off."





Re: Bad misfire
Sunday, March 11, 2012 7:26 PM
i've read on other sites that was having your type of problem
change the ICM and the coil pack
give that a try
Re: Bad misfire
Sunday, March 11, 2012 11:04 PM
yes, someone here also fixed a misfire with new coil/packs, it seems like the op has a new ICM

but what do you mean about the injectors, you have all new injectors, or the same ones but in different cylinders? I recently replaced just one injector.
Even with the new injector, the engine light came on later that day, but then everything cleared up after I cleaned the system a little.
I do have a new battery and alternator tho, and recently new plugs and plug wires.

So if my car would misfire and barely crank, I probably would think it's my starter or coils, because I already replaced the battery, alternator, plugs and plug wires, a fuel injector and cleaned.
Re: Bad misfire
Monday, March 12, 2012 5:27 AM
Sorry, I kinda crapped that paragraph up. Yeah, about 3 months ago on xmas leave it would start up fine but misfire on #1. We moved that injector to cylinder 2 and the misfire followed. Now 3 months later the same misfire is there even with new plugs and injectors but now it barely even cranks and wont start. Im gonna replace the starter and alt (they need replacement anyways) and see if that solves the issue.





"You can only feed them semen for so long before their legs fall off."




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